text: /*
   * Copyright (c) Microsoft Corporation. All rights reserved.
   * Licensed under the MIT License. See License.txt in the project root for
   * license information.
   * 
   * Code generated by Microsoft (R) AutoRest Code Generator 0.16.0.0
   * Changes may cause incorrect behavior and will be lost if the code is
   * regenerated.
   */
  
  'use strict';
  
  var util = require('util');
  var msRest = require('ms-rest');
  var msRestAzure = require('ms-rest-azure');
  var WebResource = msRest.WebResource;
  
  /**
   * @class
   * Tags
   * __NOTE__: An instance of this class is automatically created for an
   * instance of the ResourceManagementClient.
   * Initializes a new instance of the Tags class.
   * @constructor
   *
   * @param {ResourceManagementClient} client Reference to the service client.
   */
  function Tags(client) {
    this.client = client;
  }
  
  /**
   * Delete a subscription resource tag value.
   *
   * @param {string} tagName The name of the tag.
   * 
   * @param {string} tagValue The value of the tag.
   * 
   * @param {object} [options] Optional Parameters.
   * 
   * @param {object} [options.customHeaders] Headers that will be added to the
   * request
   * 
   * @param {function} callback
   *
   * @returns {function} callback(err, result, request, response)
   *
   *                      {Error}  err        - The Error object if an error occurred, null otherwise.
   *
   *                      {null} [result]   - The deserialized result object.
   *
   *                      {object} [request]  - The HTTP Request object if an error did not occur.
   *
   *                      {stream} [response] - The HTTP Response stream if an error did not occur.
   */
  Tags.prototype.deleteValue = function (tagName, tagValue, options, callback) {
    var client = this.client;
    if(!callback && typeof options === 'function') {
      callback = options;
      options = null;
    }
    if (!callback) {
      throw new Error('callback cannot be null.');
    }
    // Validate
    try {
      if (tagName === null || tagName === undefined || typeof tagName.valueOf() !== 'string') {
        throw new Error('tagName cannot be null or undefined and it must be of type string.');
      }
      if (tagValue === null || tagValue === undefined || typeof tagValue.valueOf() !== 'string') {
        throw new Error('tagValue cannot be null or undefined and it must be of type string.');
      }
      if (this.client.apiVersion === null || this.client.apiVersion === undefined || typeof this.client.apiVersion.valueOf() !== 'string') {
        throw new Error('this.client.apiVersion cannot be null or undefined and it must be of type string.');
      }
      if (this.client.subscriptionId === null || this.client.subscriptionId === undefined || typeof this.client.subscriptionId.valueOf() !== 'string') {
        throw new Error('this.client.subscriptionId cannot be null or undefined and it must be of type string.');
      }
      if (this.client.acceptLanguage !== null && this.client.acceptLanguage !== undefined && typeof this.client.acceptLanguage.valueOf() !== 'string') {
        throw new Error('this.client.acceptLanguage must be of type string.');
      }
    } catch (error) {
      return callback(error);
    }
  
    // Construct URL
    var requestUrl = this.client.baseUri +
                     '//subscriptions/{subscriptionId}/tagNames/{tagName}/tagValues/{tagValue}';
    requestUrl = requestUrl.replace('{tagName}', encodeURIComponent(tagName));
    requestUrl = requestUrl.replace('{tagValue}', encodeURIComponent(tagValue));
    requestUrl = requestUrl.replace('{subscriptionId}', encodeURIComponent(this.client.subscriptionId));
    var queryParameters = [];
    queryParameters.push('api-version=' + encodeURIComponent(this.client.apiVersion));
    if (queryParameters.length > 0) {
      requestUrl += '?' + queryParameters.join('&');
    }
    // trim all duplicate forward slashes in the url
    var regex = /([^:]\/)\/+/gi;
    requestUrl = requestUrl.replace(regex, '$1');
  
    // Create HTTP transport objects
    var httpRequest = new WebResource();
    httpRequest.method = 'DELETE';
    httpRequest.headers = {};
    httpRequest.url = requestUrl;
    // Set Headers
    if (this.client.generateClientRequestId) {
        httpRequest.headers['x-ms-client-request-id'] = msRestAzure.generateUuid();
    }
    if (this.client.acceptLanguage !== undefined && this.client.acceptLanguage !== null) {
      httpRequest.headers['accept-language'] = this.client.acceptLanguage;
    }
    if(options) {
      for(var headerName in options['customHeaders']) {
        if (options['customHeaders'].hasOwnProperty(headerName)) {
          httpRequest.headers[headerName] = options['customHeaders'][headerName];
        }
      }
    }
    httpRequest.headers['Content-Type'] = 'application/json; charset=utf-8';
    httpRequest.body = null;
    // Send Request
    return client.pipeline(httpRequest, function (err, response, responseBody) {
      if (err) {
        return callback(err);
      }
      var statusCode = response.statusCode;
      if (statusCode !== 200 && statusCode !== 204) {
        var error = new Error(responseBody);
        error.statusCode = response.statusCode;
        error.request = msRest.stripRequest(httpRequest);
        error.response = msRest.stripResponse(response);
        if (responseBody === '') responseBody = null;
        var parsedErrorResponse;
        try {
          parsedErrorResponse = JSON.parse(responseBody);
          if (parsedErrorResponse) {
            if (parsedErrorResponse.error) parsedErrorResponse = parsedErrorResponse.error;
            if (parsedErrorResponse.code) error.code = parsedErrorResponse.code;
            if (parsedErrorResponse.message) error.message = parsedErrorResponse.message;
          }
        } catch (defaultError) {
          error.message = util.format('Error "%s" occurred in deserializing the responseBody ' + 
                           '- "%s" for the default response.', defaultError.message, responseBody);
          return callback(error);
        }
        return callback(error);
      }
      // Create Result
      var result = null;
      if (responseBody === '') responseBody = null;
  
      return callback(null, result, httpRequest, response);
    });
  };
  
  /**
   * Create a subscription resource tag value.
   *
   * @param {string} tagName The name of the tag.
   * 
   * @param {string} tagValue The value of the tag.
   * 
   * @param {object} [options] Optional Parameters.
   * 
   * @param {object} [options.customHeaders] Headers that will be added to the
   * request
   * 
   * @param {function} callback
   *
   * @returns {function} callback(err, result, request, response)
   *
   *                      {Error}  err        - The Error object if an error occurred, null otherwise.
   *
   *                      {object} [result]   - The deserialized result object.
   *                      See {@link TagValue} for more information.
   *
   *                      {object} [request]  - The HTTP Request object if an error did not occur.
   *
   *                      {stream} [response] - The HTTP Response stream if an error did not occur.
   */
  Tags.prototype.createOrUpdateValue = function (tagName, tagValue, options, callback) {
    var client = this.client;
    if(!callback && typeof options === 'function') {
      callback = options;
      options = null;
    }
    if (!callback) {
      throw new Error('callback cannot be null.');
    }
    // Validate
    try {
      if (tagName === null || tagName === undefined || typeof tagName.valueOf() !== 'string') {
        throw new Error('tagName cannot be null or undefined and it must be of type string.');
      }
      if (tagValue === null || tagValue === undefined || typeof tagValue.valueOf() !== 'string') {
        throw new Error('tagValue cannot be null or undefined and it must be of type string.');
      }
      if (this.client.apiVersion === null || this.client.apiVersion === undefined || typeof this.client.apiVersion.valueOf() !== 'string') {
        throw new Error('this.client.apiVersion cannot be null or undefined and it must be of type string.');
      }
      if (this.client.subscriptionId === null || this.client.subscriptionId === undefined || typeof this.client.subscriptionId.valueOf() !== 'string') {
        throw new Error('this.client.subscriptionId cannot be null or undefined and it must be of type string.');
      }
      if (this.client.acceptLanguage !== null && this.client.acceptLanguage !== undefined && typeof this.client.acceptLanguage.valueOf() !== 'string') {
        throw new Error('this.client.acceptLanguage must be of type string.');
      }
    } catch (error) {
      return callback(error);
    }
  
    // Construct URL
    var requestUrl = this.client.baseUri +
                     '//subscriptions/{subscriptionId}/tagNames/{tagName}/tagValues/{tagValue}';
    requestUrl = requestUrl.replace('{tagName}', encodeURIComponent(tagName));
    requestUrl = requestUrl.replace('{tagValue}', encodeURIComponent(tagValue));
    requestUrl = requestUrl.replace('{subscriptionId}', encodeURIComponent(this.client.subscriptionId));
    var queryParameters = [];
    queryParameters.push('api-version=' + encodeURIComponent(this.client.apiVersion));
    if (queryParameters.length > 0) {
      requestUrl += '?' + queryParameters.join('&');
    }
    // trim all duplicate forward slashes in the url
    var regex = /([^:]\/)\/+/gi;
    requestUrl = requestUrl.replace(regex, '$1');
  
    // Create HTTP transport objects
    var httpRequest = new WebResource();
    httpRequest.method = 'PUT';
    httpRequest.headers = {};
    httpRequest.url = requestUrl;
    // Set Headers
    if (this.client.generateClientRequestId) {
        httpRequest.headers['x-ms-client-request-id'] = msRestAzure.generateUuid();
    }
    if (this.client.acceptLanguage !== undefined && this.client.acceptLanguage !== null) {
      httpRequest.headers['accept-language'] = this.client.acceptLanguage;
    }
    if(options) {
      for(var headerName in options['customHeaders']) {
        if (options['customHeaders'].hasOwnProperty(headerName)) {
          httpRequest.headers[headerName] = options['customHeaders'][headerName];
        }
      }
    }
    httpRequest.headers['Content-Type'] = 'application/json; charset=utf-8';
    httpRequest.body = null;
    // Send Request
    return client.pipeline(httpRequest, function (err, response, responseBody) {
      if (err) {
        return callback(err);
      }
      var statusCode = response.statusCode;
      if (statusCode !== 200 && statusCode !== 201) {
        var error = new Error(responseBody);
        error.statusCode = response.statusCode;
        error.request = msRest.stripRequest(httpRequest);
        error.response = msRest.stripResponse(response);
        if (responseBody === '') responseBody = null;
        var parsedErrorResponse;
        try {
          parsedErrorResponse = JSON.parse(responseBody);
          if (parsedErrorResponse) {
            if (parsedErrorResponse.error) parsedErrorResponse = parsedErrorResponse.error;
            if (parsedErrorResponse.code) error.code = parsedErrorResponse.code;
            if (parsedErrorResponse.message) error.message = parsedErrorResponse.message;
          }
          if (parsedErrorResponse !== null && parsedErrorResponse !== undefined) {
            var resultMapper = new client.models['CloudError']().mapper();
            error.body = client.deserialize(resultMapper, parsedErrorResponse, 'error.body');
          }
        } catch (defaultError) {
          error.message = util.format('Error "%s" occurred in deserializing the responseBody ' + 
                           '- "%s" for the default response.', defaultError.message, responseBody);
          return callback(error);
        }
        return callback(error);
      }
      // Create Result
      var result = null;
      if (responseBody === '') responseBody = null;
      // Deserialize Response
      if (statusCode === 200) {
        var parsedResponse = null;
        try {
          parsedResponse = JSON.parse(responseBody);
          result = JSON.parse(responseBody);
          if (parsedResponse !== null && parsedResponse !== undefined) {
            var resultMapper = new client.models['TagValue']().mapper();
            result = client.deserialize(resultMapper, parsedResponse, 'result');
          }
        } catch (error) {
          var deserializationError = new Error(util.format('Error "%s" occurred in deserializing the responseBody - "%s"', error, responseBody));
          deserializationError.request = msRest.stripRequest(httpRequest);
          deserializationError.response = msRest.stripResponse(response);
          return callback(deserializationError);
        }
      }
      // Deserialize Response
      if (statusCode === 201) {
        var parsedResponse = null;
        try {
          parsedResponse = JSON.parse(responseBody);
          result = JSON.parse(responseBody);
          if (parsedResponse !== null && parsedResponse !== undefined) {
            var resultMapper = new client.models['TagValue']().mapper();
            result = client.deserialize(resultMapper, parsedResponse, 'result');
          }
        } catch (error) {
          var deserializationError1 = new Error(util.format('Error "%s" occurred in deserializing the responseBody - "%s"', error, responseBody));
          deserializationError1.request = msRest.stripRequest(httpRequest);
          deserializationError1.response = msRest.stripResponse(response);
          return callback(deserializationError1);
        }
      }
  
      return callback(null, result, httpRequest, response);
    });
  };
  
  /**
   * Create a subscription resource tag.
   *
   * @param {string} tagName The name of the tag.
   * 
   * @param {object} [options] Optional Parameters.
   * 
   * @param {object} [options.customHeaders] Headers that will be added to the
   * request
   * 
   * @param {function} callback
   *
   * @returns {function} callback(err, result, request, response)
   *
   *                      {Error}  err        - The Error object if an error occurred, null otherwise.
   *
   *                      {object} [result]   - The deserialized result object.
   *                      See {@link TagDetails} for more information.
   *
   *                      {object} [request]  - The HTTP Request object if an error did not occur.
   *
   *                      {stream} [response] - The HTTP Response stream if an error did not occur.
   */
  Tags.prototype.createOrUpdate = function (tagName, options, callback) {
    var client = this.client;
    if(!callback && typeof options === 'function') {
      callback = options;
      options = null;
    }
    if (!callback) {
      throw new Error('callback cannot be null.');
    }
    // Validate
    try {
      if (tagName === null || tagName === undefined || typeof tagName.valueOf() !== 'string') {
        throw new Error('tagName cannot be null or undefined and it must be of type string.');
      }
      if (this.client.apiVersion === null || this.client.apiVersion === undefined || typeof this.client.apiVersion.valueOf() !== 'string') {
        throw new Error('this.client.apiVersion cannot be null or undefined and it must be of type string.');
      }
      if (this.client.subscriptionId === null || this.client.subscriptionId === undefined || typeof this.client.subscriptionId.valueOf() !== 'string') {
        throw new Error('this.client.subscriptionId cannot be null or undefined and it must be of type string.');
      }
      if (this.client.acceptLanguage !== null && this.client.acceptLanguage !== undefined && typeof this.client.acceptLanguage.valueOf() !== 'string') {
        throw new Error('this.client.acceptLanguage must be of type string.');
      }
    } catch (error) {
      return callback(error);
    }
  
    // Construct URL
    var requestUrl = this.client.baseUri +
                     '//subscriptions/{subscriptionId}/tagNames/{tagName}';
    requestUrl = requestUrl.replace('{tagName}', encodeURIComponent(tagName));
    requestUrl = requestUrl.replace('{subscriptionId}', encodeURIComponent(this.client.subscriptionId));
    var queryParameters = [];
    queryParameters.push('api-version=' + encodeURIComponent(this.client.apiVersion));
    if (queryParameters.length > 0) {
      requestUrl += '?' + queryParameters.join('&');
    }
    // trim all duplicate forward slashes in the url
    var regex = /([^:]\/)\/+/gi;
    requestUrl = requestUrl.replace(regex, '$1');
  
    // Create HTTP transport objects
    var httpRequest = new WebResource();
    httpRequest.method = 'PUT';
    httpRequest.headers = {};
    httpRequest.url = requestUrl;
    // Set Headers
    if (this.client.generateClientRequestId) {
        httpRequest.headers['x-ms-client-request-id'] = msRestAzure.generateUuid();
    }
    if (this.client.acceptLanguage !== undefined && this.client.acceptLanguage !== null) {
      httpRequest.headers['accept-language'] = this.client.acceptLanguage;
    }
    if(options) {
      for(var headerName in options['customHeaders']) {
        if (options['customHeaders'].hasOwnProperty(headerName)) {
          httpRequest.headers[headerName] = options['customHeaders'][headerName];
        }
      }
    }
    httpRequest.headers['Content-Type'] = 'application/json; charset=utf-8';
    httpRequest.body = null;
    // Send Request
    return client.pipeline(httpRequest, function (err, response, responseBody) {
      if (err) {
        return callback(err);
      }
      var statusCode = response.statusCode;
      if (statusCode !== 200 && statusCode !== 201) {
        var error = new Error(responseBody);
        error.statusCode = response.statusCode;
        error.request = msRest.stripRequest(httpRequest);
        error.response = msRest.stripResponse(response);
        if (responseBody === '') responseBody = null;
        var parsedErrorResponse;
        try {
          parsedErrorResponse = JSON.parse(responseBody);
          if (parsedErrorResponse) {
            if (parsedErrorResponse.error) parsedErrorResponse = parsedErrorResponse.error;
            if (parsedErrorResponse.code) error.code = parsedErrorResponse.code;
            if (parsedErrorResponse.message) error.message = parsedErrorResponse.message;
          }
          if (parsedErrorResponse !== null && parsedErrorResponse !== undefined) {
            var resultMapper = new client.models['CloudError']().mapper();
            error.body = client.deserialize(resultMapper, parsedErrorResponse, 'error.body');
          }
        } catch (defaultError) {
          error.message = util.format('Error "%s" occurred in deserializing the responseBody ' + 
                           '- "%s" for the default response.', defaultError.message, responseBody);
          return callback(error);
        }
        return callback(error);
      }
      // Create Result
      var result = null;
      if (responseBody === '') responseBody = null;
      // Deserialize Response
      if (statusCode === 200) {
        var parsedResponse = null;
        try {
          parsedResponse = JSON.parse(responseBody);
          result = JSON.parse(responseBody);
          if (parsedResponse !== null && parsedResponse !== undefined) {
            var resultMapper = new client.models['TagDetails']().mapper();
            result = client.deserialize(resultMapper, parsedResponse, 'result');
          }
        } catch (error) {
          var deserializationError = new Error(util.format('Error "%s" occurred in deserializing the responseBody - "%s"', error, responseBody));
          deserializationError.request = msRest.stripRequest(httpRequest);
          deserializationError.response = msRest.stripResponse(response);
          return callback(deserializationError);
        }
      }
      // Deserialize Response
      if (statusCode === 201) {
        var parsedResponse = null;
        try {
          parsedResponse = JSON.parse(responseBody);
          result = JSON.parse(responseBody);
          if (parsedResponse !== null && parsedResponse !== undefined) {
            var resultMapper = new client.models['TagDetails']().mapper();
            result = client.deserialize(resultMapper, parsedResponse, 'result');
          }
        } catch (error) {
          var deserializationError1 = new Error(util.format('Error "%s" occurred in deserializing the responseBody - "%s"', error, responseBody));
          deserializationError1.request = msRest.stripRequest(httpRequest);
          deserializationError1.response = msRest.stripResponse(response);
          return callback(deserializationError1);
        }
      }
  
      return callback(null, result, httpRequest, response);
    });
  };
  
  /**
   * Delete a subscription resource tag.
   *
   * @param {string} tagName The name of the tag.
   * 
   * @param {object} [options] Optional Parameters.
   * 
   * @param {object} [options.customHeaders] Headers that will be added to the
   * request
   * 
   * @param {function} callback
   *
   * @returns {function} callback(err, result, request, response)
   *
   *                      {Error}  err        - The Error object if an error occurred, null otherwise.
   *
   *                      {null} [result]   - The deserialized result object.
   *
   *                      {object} [request]  - The HTTP Request object if an error did not occur.
   *
   *                      {stream} [response] - The HTTP Response stream if an error did not occur.
   */
  Tags.prototype.deleteMethod = function (tagName, options, callback) {
    var client = this.client;
    if(!callback && typeof options === 'function') {
      callback = options;
      options = null;
    }
    if (!callback) {
      throw new Error('callback cannot be null.');
    }
    // Validate
    try {
      if (tagName === null || tagName === undefined || typeof tagName.valueOf() !== 'string') {
        throw new Error('tagName cannot be null or undefined and it must be of type string.');
      }
      if (this.client.apiVersion === null || this.client.apiVersion === undefined || typeof this.client.apiVersion.valueOf() !== 'string') {
        throw new Error('this.client.apiVersion cannot be null or undefined and it must be of type string.');
      }
      if (this.client.subscriptionId === null || this.client.subscriptionId === undefined || typeof this.client.subscriptionId.valueOf() !== 'string') {
        throw new Error('this.client.subscriptionId cannot be null or undefined and it must be of type string.');
      }
      if (this.client.acceptLanguage !== null && this.client.acceptLanguage !== undefined && typeof this.client.acceptLanguage.valueOf() !== 'string') {
        throw new Error('this.client.acceptLanguage must be of type string.');
      }
    } catch (error) {
      return callback(error);
    }
  
    // Construct URL
    var requestUrl = this.client.baseUri +
                     '//subscriptions/{subscriptionId}/tagNames/{tagName}';
    requestUrl = requestUrl.replace('{tagName}', encodeURIComponent(tagName));
    requestUrl = requestUrl.replace('{subscriptionId}', encodeURIComponent(this.client.subscriptionId));
    var queryParameters = [];
    queryParameters.push('api-version=' + encodeURIComponent(this.client.apiVersion));
    if (queryParameters.length > 0) {
      requestUrl += '?' + queryParameters.join('&');
    }
    // trim all duplicate forward slashes in the url
    var regex = /([^:]\/)\/+/gi;
    requestUrl = requestUrl.replace(regex, '$1');
  
    // Create HTTP transport objects
    var httpRequest = new WebResource();
    httpRequest.method = 'DELETE';
    httpRequest.headers = {};
    httpRequest.url = requestUrl;
    // Set Headers
    if (this.client.generateClientRequestId) {
        httpRequest.headers['x-ms-client-request-id'] = msRestAzure.generateUuid();
    }
    if (this.client.acceptLanguage !== undefined && this.client.acceptLanguage !== null) {
      httpRequest.headers['accept-language'] = this.client.acceptLanguage;
    }
    if(options) {
      for(var headerName in options['customHeaders']) {
        if (options['customHeaders'].hasOwnProperty(headerName)) {
          httpRequest.headers[headerName] = options['customHeaders'][headerName];
        }
      }
    }
    httpRequest.headers['Content-Type'] = 'application/json; charset=utf-8';
    httpRequest.body = null;
    // Send Request
    return client.pipeline(httpRequest, function (err, response, responseBody) {
      if (err) {
        return callback(err);
      }
      var statusCode = response.statusCode;
      if (statusCode !== 200 && statusCode !== 204) {
        var error = new Error(responseBody);
        error.statusCode = response.statusCode;
        error.request = msRest.stripRequest(httpRequest);
        error.response = msRest.stripResponse(response);
        if (responseBody === '') responseBody = null;
        var parsedErrorResponse;
        try {
          parsedErrorResponse = JSON.parse(responseBody);
          if (parsedErrorResponse) {
            if (parsedErrorResponse.error) parsedErrorResponse = parsedErrorResponse.error;
            if (parsedErrorResponse.code) error.code = parsedErrorResponse.code;
            if (parsedErrorResponse.message) error.message = parsedErrorResponse.message;
          }
        } catch (defaultError) {
          error.message = util.format('Error "%s" occurred in deserializing the responseBody ' + 
                           '- "%s" for the default response.', defaultError.message, responseBody);
          return callback(error);
        }
        return callback(error);
      }
      // Create Result
      var result = null;
      if (responseBody === '') responseBody = null;
  
      return callback(null, result, httpRequest, response);
    });
  };
  
  /**
   * Get a list of subscription resource tags.
   *
   * @param {object} [options] Optional Parameters.
   * 
   * @param {object} [options.customHeaders] Headers that will be added to the
   * request
   * 
   * @param {function} callback
   *
   * @returns {function} callback(err, result, request, response)
   *
   *                      {Error}  err        - The Error object if an error occurred, null otherwise.
   *
   *                      {object} [result]   - The deserialized result object.
   *                      See {@link TagsListResult} for more information.
   *
   *                      {object} [request]  - The HTTP Request object if an error did not occur.
   *
   *                      {stream} [response] - The HTTP Response stream if an error did not occur.
   */
  Tags.prototype.list = function (options, callback) {
    var client = this.client;
    if(!callback && typeof options === 'function') {
      callback = options;
      options = null;
    }
    if (!callback) {
      throw new Error('callback cannot be null.');
    }
    // Validate
    try {
      if (this.client.apiVersion === null || this.client.apiVersion === undefined || typeof this.client.apiVersion.valueOf() !== 'string') {
        throw new Error('this.client.apiVersion cannot be null or undefined and it must be of type string.');
      }
      if (this.client.subscriptionId === null || this.client.subscriptionId === undefined || typeof this.client.subscriptionId.valueOf() !== 'string') {
        throw new Error('this.client.subscriptionId cannot be null or undefined and it must be of type string.');
      }
      if (this.client.acceptLanguage !== null && this.client.acceptLanguage !== undefined && typeof this.client.acceptLanguage.valueOf() !== 'string') {
        throw new Error('this.client.acceptLanguage must be of type string.');
      }
    } catch (error) {
      return callback(error);
    }
  
    // Construct URL
    var requestUrl = this.client.baseUri +
                     '//subscriptions/{subscriptionId}/tagNames';
    requestUrl = requestUrl.replace('{subscriptionId}', encodeURIComponent(this.client.subscriptionId));
    var queryParameters = [];
    queryParameters.push('api-version=' + encodeURIComponent(this.client.apiVersion));
    if (queryParameters.length > 0) {
      requestUrl += '?' + queryParameters.join('&');
    }
    // trim all duplicate forward slashes in the url
    var regex = /([^:]\/)\/+/gi;
    requestUrl = requestUrl.replace(regex, '$1');
  
    // Create HTTP transport objects
    var httpRequest = new WebResource();
    httpRequest.method = 'GET';
    httpRequest.headers = {};
    httpRequest.url = requestUrl;
    // Set Headers
    if (this.client.generateClientRequestId) {
        httpRequest.headers['x-ms-client-request-id'] = msRestAzure.generateUuid();
    }
    if (this.client.acceptLanguage !== undefined && this.client.acceptLanguage !== null) {
      httpRequest.headers['accept-language'] = this.client.acceptLanguage;
    }
    if(options) {
      for(var headerName in options['customHeaders']) {
        if (options['customHeaders'].hasOwnProperty(headerName)) {
          httpRequest.headers[headerName] = options['customHeaders'][headerName];
        }
      }
    }
    httpRequest.headers['Content-Type'] = 'application/json; charset=utf-8';
    httpRequest.body = null;
    // Send Request
    return client.pipeline(httpRequest, function (err, response, responseBody) {
      if (err) {
        return callback(err);
      }
      var statusCode = response.statusCode;
      if (statusCode !== 200) {
        var error = new Error(responseBody);
        error.statusCode = response.statusCode;
        error.request = msRest.stripRequest(httpRequest);
        error.response = msRest.stripResponse(response);
        if (responseBody === '') responseBody = null;
        var parsedErrorResponse;
        try {
          parsedErrorResponse = JSON.parse(responseBody);
          if (parsedErrorResponse) {
            if (parsedErrorResponse.error) parsedErrorResponse = parsedErrorResponse.error;
            if (parsedErrorResponse.code) error.code = parsedErrorResponse.code;
            if (parsedErrorResponse.message) error.message = parsedErrorResponse.message;
          }
          if (parsedErrorResponse !== null && parsedErrorResponse !== undefined) {
            var resultMapper = new client.models['CloudError']().mapper();
            error.body = client.deserialize(resultMapper, parsedErrorResponse, 'error.body');
          }
        } catch (defaultError) {
          error.message = util.format('Error "%s" occurred in deserializing the responseBody ' + 
                           '- "%s" for the default response.', defaultError.message, responseBody);
          return callback(error);
        }
        return callback(error);
      }
      // Create Result
      var result = null;
      if (responseBody === '') responseBody = null;
      // Deserialize Response
      if (statusCode === 200) {
        var parsedResponse = null;
        try {
          parsedResponse = JSON.parse(responseBody);
          result = JSON.parse(responseBody);
          if (parsedResponse !== null && parsedResponse !== undefined) {
            var resultMapper = new client.models['TagsListResult']().mapper();
            result = client.deserialize(resultMapper, parsedResponse, 'result');
          }
        } catch (error) {
          var deserializationError = new Error(util.format('Error "%s" occurred in deserializing the responseBody - "%s"', error, responseBody));
          deserializationError.request = msRest.stripRequest(httpRequest);
          deserializationError.response = msRest.stripResponse(response);
          return callback(deserializationError);
        }
      }
  
      return callback(null, result, httpRequest, response);
    });
  };
  
  /**
   * Get a list of subscription resource tags.
   *
   * @param {string} nextPageLink The NextLink from the previous successful call
   * to List operation.
   * 
   * @param {object} [options] Optional Parameters.
   * 
   * @param {object} [options.customHeaders] Headers that will be added to the
   * request
   * 
   * @param {function} callback
   *
   * @returns {function} callback(err, result, request, response)
   *
   *                      {Error}  err        - The Error object if an error occurred, null otherwise.
   *
   *                      {object} [result]   - The deserialized result object.
   *                      See {@link TagsListResult} for more information.
   *
   *                      {object} [request]  - The HTTP Request object if an error did not occur.
   *
   *                      {stream} [response] - The HTTP Response stream if an error did not occur.
   */
  Tags.prototype.listNext = function (nextPageLink, options, callback) {
    var client = this.client;
    if(!callback && typeof options === 'function') {
      callback = options;
      options = null;
    }
    if (!callback) {
      throw new Error('callback cannot be null.');
    }
    // Validate
    try {
      if (nextPageLink === null || nextPageLink === undefined || typeof nextPageLink.valueOf() !== 'string') {
        throw new Error('nextPageLink cannot be null or undefined and it must be of type string.');
      }
      if (this.client.acceptLanguage !== null && this.client.acceptLanguage !== undefined && typeof this.client.acceptLanguage.valueOf() !== 'string') {
        throw new Error('this.client.acceptLanguage must be of type string.');
      }
    } catch (error) {
      return callback(error);
    }
  
    // Construct URL
    var requestUrl = '{nextLink}';
    requestUrl = requestUrl.replace('{nextLink}', nextPageLink);
    // trim all duplicate forward slashes in the url
    var regex = /([^:]\/)\/+/gi;
    requestUrl = requestUrl.replace(regex, '$1');
  
    // Create HTTP transport objects
    var httpRequest = new WebResource();
    httpRequest.method = 'GET';
    httpRequest.headers = {};
    httpRequest.url = requestUrl;
    // Set Headers
    if (this.client.generateClientRequestId) {
        httpRequest.headers['x-ms-client-request-id'] = msRestAzure.generateUuid();
    }
    if (this.client.acceptLanguage !== undefined && this.client.acceptLanguage !== null) {
      httpRequest.headers['accept-language'] = this.client.acceptLanguage;
    }
    if(options) {
      for(var headerName in options['customHeaders']) {
        if (options['customHeaders'].hasOwnProperty(headerName)) {
          httpRequest.headers[headerName] = options['customHeaders'][headerName];
        }
      }
    }
    httpRequest.headers['Content-Type'] = 'application/json; charset=utf-8';
    httpRequest.body = null;
    // Send Request
    return client.pipeline(httpRequest, function (err, response, responseBody) {
      if (err) {
        return callback(err);
      }
      var statusCode = response.statusCode;
      if (statusCode !== 200) {
        var error = new Error(responseBody);
        error.statusCode = response.statusCode;
        error.request = msRest.stripRequest(httpRequest);
        error.response = msRest.stripResponse(response);
        if (responseBody === '') responseBody = null;
        var parsedErrorResponse;
        try {
          parsedErrorResponse = JSON.parse(responseBody);
          if (parsedErrorResponse) {
            if (parsedErrorResponse.error) parsedErrorResponse = parsedErrorResponse.error;
            if (parsedErrorResponse.code) error.code = parsedErrorResponse.code;
            if (parsedErrorResponse.message) error.message = parsedErrorResponse.message;
          }
          if (parsedErrorResponse !== null && parsedErrorResponse !== undefined) {
            var resultMapper = new client.models['CloudError']().mapper();
            error.body = client.deserialize(resultMapper, parsedErrorResponse, 'error.body');
          }
        } catch (defaultError) {
          error.message = util.format('Error "%s" occurred in deserializing the responseBody ' + 
                           '- "%s" for the default response.', defaultError.message, responseBody);
          return callback(error);
        }
        return callback(error);
      }
      // Create Result
      var result = null;
      if (responseBody === '') responseBody = null;
      // Deserialize Response
      if (statusCode === 200) {
        var parsedResponse = null;
        try {
          parsedResponse = JSON.parse(responseBody);
          result = JSON.parse(responseBody);
          if (parsedResponse !== null && parsedResponse !== undefined) {
            var resultMapper = new client.models['TagsListResult']().mapper();
            result = client.deserialize(resultMapper, parsedResponse, 'result');
          }
        } catch (error) {
          var deserializationError = new Error(util.format('Error "%s" occurred in deserializing the responseBody - "%s"', error, responseBody));
          deserializationError.request = msRest.stripRequest(httpRequest);
          deserializationError.response = msRest.stripResponse(response);
          return callback(deserializationError);
        }
      }
  
      return callback(null, result, httpRequest, response);
    });
  };
  
  
  module.exports = Tags;
  